MIKOVÁ, Martina, Michal SEDLÁK, Ivan STRAKA, Michal MIČUDA, Mário ZIMAN, Miroslav JEŽEK, Miloslav DUŠEK and Jaromír FIURÁŠEK. Optimal entanglement-assisted discrimination of quantum measurements. Physical Review. 2014, vol. 90, No 2, p. 022317-22322. ISSN 1050-2947. Available from: https://dx.doi.org/10.1103/PhysRevA.90.022317.
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Basic information
Original name Optimal entanglement-assisted discrimination of quantum measurements
Name in Czech Optimální provázaním asistovaná diskriminace kvantových měření
Authors MIKOVÁ, Martina (203 Czech Republic), Michal SEDLÁK (703 Slovakia), Ivan STRAKA (203 Czech Republic), Michal MIČUDA (203 Czech Republic), Mário ZIMAN (703 Slovakia, belonging to the institution), Miroslav JEŽEK (203 Czech Republic), Miloslav DUŠEK (203 Czech Republic) and Jaromír FIURÁŠEK (203 Czech Republic).
Edition Physical Review, 2014, 1050-2947.
Other information
Original language English
Type of outcome Article in a journal
Field of Study 10301 Atomic, molecular and chemical physics
Country of publisher United States of America
Confidentiality degree is not subject to a state or trade secret
WWW URL
Impact factor Impact factor: 2.808
RIV identification code RIV/00216224:14330/14:00080087
Organization unit Faculty of Informatics
Doi http://dx.doi.org/10.1103/PhysRevA.90.022317
UT WoS 000341251400007
Keywords in English quantum measurement; quantum information; quantum optics
Changed by Changed by: RNDr. Pavel Šmerk, Ph.D., učo 3880. Changed: 27/4/2015 05:06.
Abstract
We investigate optimal discrimination between two projective single-qubit measurements in a scenario where the measurement can be performed only once. We consider general setting involving a tunable fraction of inconclusive outcomes and we prove that the optimal discrimination strategy requires an entangled probe state for any nonzero rate of inconclusive outcomes. We experimentally implement this optimal discrimination strategy for projective measurements on polarization states of single photons. Our setup involves a real-time electrooptical feed-forward loop which allows us to fully harness the benefits of entanglement in discrimination of quantum measurements. The experimental data clearly demonstrate the advantage of entanglement-based discrimination strategy as compared to unentangled single-qubit probes.
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